https://www.ipg-journal.de/regionen/europa/artikel/detail/national-oekologisches-patchwork-3976/
https://www.socialeurope.eu/eu-competition-policy-needs-a-fundamental-rethink
https://www.sachverstaendigenrat-wirtschaft.de/fileadmin/dateiablage/gutachten/jg201819/Chapter_1.pdf
https://www.frontiersin.org/articles/10.3389/fpos.2021.678526/full